for (let key in $engine) {
    let module = $engine[key];
    for (let pageKey in module) {
        let page = module[pageKey];
        for (let funcKey in page) {
            let func = page[funcKey];
            func((res)=> {
                console.log('============== ' + pageKey + ': ' + funcKey + ' =================');
                console.log(res);
            })
        }
    }
}